PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/13-07:57:50
G08     320.3          11.6                2.1 +/-   19.40       5.5 +/-   19.40  0.030 / 0.040
G10     307.1          55.1                5.3 +/-    1.21       6.3 +/-    1.21  0.030 / 0.030
G14     211.3          17.4                4.8 +/-    2.63      11.3 +/-    2.63  0.050 / 0.040
G15     45.5           22.0                3.4 +/-    2.65       7.2 +/-    2.65  0.050 / 0.040
G20     6.4            64.6                6.1 +/-    0.80       6.7 +/-    0.80  0.130 / 0.350
G21     113.3          68.2                6.9 +/-    0.87       7.3 +/-    0.87  0.180 / 0.370
G24     90.2           28.1                6.1 +/-    1.02      11.0 +/-    1.02  0.090 / 0.100
G27     296.0          35.4                5.4 +/-    3.12       8.6 +/-    3.12  0.080 / 0.080
G32     213.8          31.9                6.9 +/-    2.14      11.6 +/-    2.14  0.140 / 0.200